Hoist drum



Jan. 29,v 1929. 1,700,313

E. E. GREVE.

HOIST DRUM Filed Sept. 24, 1924 ATTORNEY yPatented Jan. 29,1929. f n e UMTED STATES rA'izszrul OFFICE.

Hors'r DRUM.

Application ined. september 24, 1924. serian No. 739,735.

This invention is for a drum for hoists, surface 8. The inner 'edgeof each surface such are commonly used during drilling may have a bead 9 thereon, in whi'c'h may be and other operations around oil or gas Wells, one or more suitably placed perforations 10, and for other purposes. v for the purpose hereinafter described. In hoist drums as now commonly used, the Carried on the periphery of each hub surside flanges of the drum have peripheral faces face 8 is a separate flange l1 preferably havabout which are brake bands, and braking lng a channeled periphery 12, in which the is effected by contraction of such bands about usual brake bands 13 may engage and be the peripheral braking surfaces of the guided. The separate flange may be keyed 65 10 flanges. Very heavy loads, often running to thehub flange by one or more suitable keys into many tons, are handled by these drums, 14. Holes 10 are located opposite these keys and a considerable braking surface is rein Order to permit of the insertion of a suitquired. A considerable amount of heat is abi@ driving pin tobe used in forcing the also generated by the braking action, and keys out, when necessary. A key retaining 7n drums as now constructed are unsatisfactory ring is indicated at 15.

and the flanges frequently break because of Suitable heat insulation, preferably one or the heat to which they are subject. more thicknesses of sheet asbestos 16, are in- Fmthermej the tendency of the flanges terposed between the separate flanges and the to break is further increased by reason of the outer hubs on which they are carried. 75 line, which, when wound in one or more layers Vith the construction thus provided, the on the drum, produces a lateral pressure or lllklng flanges are virtually floating flanges wedging action on the flanges. n `carried by the drum. The heat of friction y The present invention has for its principal 1s practically all confined to these braking object to provide a drum wherein the flanges flanges and they are free to expand and con- 8" are, less Subject t0 breakage from Such Causes. tract naturally under the Varying te1npe1a-- A further important object of the inven-A tures. to which they are subject, without subtion is to provide a drum having the flanges jecting the integral hub flanges to any strain. constructed in two parts in such manner as lfulfthcl'nlole, the integral flanges 8 are relato compensate for expansion and contraction tively small, so that they can be cast more B under varying thermal conditions, thereby readily and with less chance of breakage, eliminating breakage from such cause, than the large ones heretofore used. The A further object is to provide a drum of construction provided by my invention is also generally improved `design and construction. less Subject to breakage because of the out- The invention may be readily understood Word pressure or Wedging action of the m, by reference to the accompanying drawings wound up cables. which illustrate a preferred embodiment of A diagonal opening 17 may be provided the invention, but to the construction of in one of the hub flanges to which the end which the invention is not confined. In the of the cable may be passed. drawings; Various changes and modifications mayy 4o Fig. 1 represents a longitudinal section be made in the device within the contemplathrough the drum; and tion of the invention and under the scope kof* Fig. 2 represents an end View of the drum the appended claims. shown in Fig. 1. I claim as my invention:

In the drawings, 2 is the usual drum shaft, l l. A hoist drum having a flange compriswe 3 is the body; of the drum, and l designates ing outer and inner parte, one part having inner hub portions of the drum, by means of a braking surface thereon, and heat insulawhich the drum is supported on the shaft. tlon interposed between the parts. Keys 5 may be employed to rigidly-,connect 2. A hoist drum having a side flange prothe drum and shaft. At each end of the shaft vided with an inner supporting portion and 50 may be key retainers 6, Which may comprise an outer eXpansible braking portion separate rings shrunk in place on the shaft at each end therefrom and secured thereto, and heat Ainof the drum. Their presence is not essential, sulation between the outer portion and the however. supporting portion.

Carried by the drum at each end thereof, 3. A hoist drum comprising a flange havilo and preferably integral therewith, are short ing a beaded periphery, a brake flange seflanges or hubs 7 having a wide peripheral cured to the periphery of said first flange and partially retained in position by the bead, a key securing the braking flange to the periphery of the first flange, key retaining n'ieans on the first flange, the bead 0f the periphery of the first flange having a hole therein opposite said key through which key driving means may pass for removing the key.

4. A lioist drum comprising a flange having a beaded periphery, a brake flange seriphery of the yfirst flange, key retaining means on the first flange, and heat insulating material interposed between the first flange and the braking flange.

In testimony whereof I affix my signature.

EDGAR E. GREVE. 

